01 - If using wooden skewers, submerge them in water and soak for at least 20 minutes to prevent burning on the grill.
02 - In a mixing bowl, whisk together the soy sauce, honey, brown sugar, gochujang, sesame oil, rice vinegar, minced garlic, and grated ginger until smooth and well combined.
03 - Place the chicken cubes in a separate bowl, drizzle with vegetable oil, and season with salt and pepper. Toss until all pieces are evenly coated.
04 - Thread the seasoned chicken pieces evenly onto the prepared skewers, leaving a small gap between each cube for even cooking.
05 - Preheat an outdoor grill or grill pan to medium-high heat, approximately 400°F.
06 - Place the skewers on the hot grill and cook for 4 minutes. Brush generously with the Korean BBQ sauce, flip, and continue cooking for another 4 minutes, brushing frequently. Cook until the chicken reaches an internal temperature of 165°F and develops a caramelized, glossy glaze.
07 - Transfer the skewers to a serving platter, sprinkle with sesame seeds and sliced spring onions, and serve with any remaining sauce on the side.